Girl on Summer Stairwell With Backlit Flashback Reference

the prompt

① Use @image3 as the first frame. The girl matches @image1 exactly. For the flashback, reference @image2 for the boy's bracing hand, backlit silhouette, and lapel-pin design.
② Same summer stairwell, only the girl present, bright afternoon light, empty space.
③ FOLLOW THE STORYBOARD EXACTLY. A distinct beat every ~1.5s through the 8 panels in order:
   0.0-1.5s (panel 1): her POV looking down at the fallen books on the steps.
   1.5-3.0s (panel 2): her hand reaches and picks up a small object.
   3.0-4.5s (panel 3): a small dark-red enamel lapel pin resting in her palm — close-up.
   4.5-6.0s (panel 4): her face, eyes widening in realization — close-up.
   6.0-7.5s (panel 5): a brief desaturated flashback of the boy's bracing hand and silhouette flickers in.
   7.5-9.0s (panel 6): she lifts her head toward the corner where he vanished.
   9.0-10.5s (panel 7): the empty sunlit summer stairwell, no one there — wide.
   10.5-12.0s (panel 8): her small figure looking off-screen, negative space at top for end-card text.
   12.0-15.0s: hold the wide, slow settle for the end-card.
④ Camera: hand-detail close-up → tilt up to her face → pull back to wide. Audio: stillness, faint metallic tap of the pin, soft musical sting at the flashback, cicadas returning, then quiet.
⑤ Anime, clean anime cel-style, slice-of-life, thin clean lineart, soft cel shading, identical rendering to the character sheets. Each beat distinct, no hard cuts — one shot. (Generation length 15s.)